To omit or neglect unintentionally: To cease to remember; To forget (about) is to stop thinking about someone or something, or to stop thinking about doing something: To cease or fail to remember; To forget ones keys. The meaning of forget is to lose the remembrance of : Be unable to think of or recall. How to use forget in a sentence. See examples of forget used in a sentence. To fail to think of; Be unable to recall: Take no note of (often used imperatively): 路 forget (third-person singular simple present forgets, present participle forgetting, simple past forgot or (obsolete) forgat, past participle forgotten or (archaic or colloquial) forgot) (transitive) to lose remembrance of. Be unable to recall. Synonym discussion of forget. To forget a name. To leave behind unintentionally: I forgot to lock the gate. Forget cooking, lets eat out tonight.